Wiring Prosonic M - FOUNDATION Fieldbus
30 Endress+Hauser
4.5 Recommended connection
L00-FMU4xxxx-17-00-00-yy-014
1 External ground terminal of the transmitter
For maximum EMC protection please observe the following points:
• As the metal housing of the Prosonic M is isolated from the tank by the plastic sensor, a low-
impedance connection between the housing and tank/bracket/flange should be installed in order
to ensure electromagnetic compatibility (EMC).
For optimum EMC the connection should be as short as possible. Ideally, a ground strap should
be used.
• The continuity of the cable screening between tapping points must be ensured.
• If potential equalisation is present between the individual grounding points, ground the screening
at each cable end or connect it to the device housing (as short as possible).
• If there are large differences in potential between grounding points, the grounding should run via
a capacitor that is suitable for high frequency use (e.g. ceramic 10 nF/250 V&).
"
Caution!
Applications, which are subject to the explosion prevention, permit only under special conditions
the repeated grounding of the protective screen , see to EN 60 079-14..
4.6 Post connection check
After wiring the device, carry out the following checks:
• Are the terminals correctly assigned?
• Is the cable gland tight?
• If available: Is the FOUNDATION Fieldbus connector screwed tight?
• Is the housing cover fully screwed on?
• If power supply available: Does a display appear on the display module?
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